[thirdparty/linux.git] / net / ipv6 / ip6_udp_tunnel.c

// SPDX-License-Identifier: GPL-2.0-only
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/socket.h>
#include <linux/udp.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/in6.h>
#include <net/udp.h>
#include <net/udp_tunnel.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include <net/ip6_tunnel.h>
#include <net/ip6_checksum.h>

int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg,
		     struct socket **sockp)
{
	struct sockaddr_in6 udp6_addr = {};
	int err;
	struct socket *sock = NULL;

	err = sock_create_kern(net, AF_INET6, SOCK_DGRAM, 0, &sock);
	if (err < 0)
		goto error;

	if (cfg->ipv6_v6only) {
		int val = 1;

		err = kernel_setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
					(char *) &val, sizeof(val));
		if (err < 0)
			goto error;
	}
	if (cfg->bind_ifindex) {
		err = kernel_setsockopt(sock, SOL_SOCKET, SO_BINDTOIFINDEX,
					(void *)&cfg->bind_ifindex,
					sizeof(cfg->bind_ifindex));
		if (err < 0)
			goto error;
	}

	udp6_addr.sin6_family = AF_INET6;
	memcpy(&udp6_addr.sin6_addr, &cfg->local_ip6,
	       sizeof(udp6_addr.sin6_addr));
	udp6_addr.sin6_port = cfg->local_udp_port;
	err = kernel_bind(sock, (struct sockaddr *)&udp6_addr,
			  sizeof(udp6_addr));
	if (err < 0)
		goto error;

	if (cfg->peer_udp_port) {
		memset(&udp6_addr, 0, sizeof(udp6_addr));
		udp6_addr.sin6_family = AF_INET6;
		memcpy(&udp6_addr.sin6_addr, &cfg->peer_ip6,
		       sizeof(udp6_addr.sin6_addr));
		udp6_addr.sin6_port = cfg->peer_udp_port;
		err = kernel_connect(sock,
				     (struct sockaddr *)&udp6_addr,
				     sizeof(udp6_addr), 0);
	}
	if (err < 0)
		goto error;

	udp_set_no_check6_tx(sock->sk, !cfg->use_udp6_tx_checksums);
	udp_set_no_check6_rx(sock->sk, !cfg->use_udp6_rx_checksums);

	*sockp = sock;
	return 0;

error:
	if (sock) {
		kernel_sock_shutdown(sock, SHUT_RDWR);
		sock_release(sock);
	}
	*sockp = NULL;
	return err;
}
EXPORT_SYMBOL_GPL(udp_sock_create6);

int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk,
			 struct sk_buff *skb,
			 struct net_device *dev, struct in6_addr *saddr,
			 struct in6_addr *daddr,
			 __u8 prio, __u8 ttl, __be32 label,
			 __be16 src_port, __be16 dst_port, bool nocheck)
{
	struct udphdr *uh;
	struct ipv6hdr *ip6h;

	__skb_push(skb, sizeof(*uh));
	skb_reset_transport_header(skb);
	uh = udp_hdr(skb);

	uh->dest = dst_port;
	uh->source = src_port;

	uh->len = htons(skb->len);

	skb_dst_set(skb, dst);

	udp6_set_csum(nocheck, skb, saddr, daddr, skb->len);

	__skb_push(skb, sizeof(*ip6h));
	skb_reset_network_header(skb);
	ip6h		  = ipv6_hdr(skb);
	ip6_flow_hdr(ip6h, prio, label);
	ip6h->payload_len = htons(skb->len);
	ip6h->nexthdr     = IPPROTO_UDP;
	ip6h->hop_limit   = ttl;
	ip6h->daddr	  = *daddr;
	ip6h->saddr	  = *saddr;

	ip6tunnel_xmit(sk, skb, dev);
	return 0;
}
EXPORT_SYMBOL_GPL(udp_tunnel6_xmit_skb);

MODULE_LICENSE("GPL");
Commit	Line	Data
09c434b8	1	// SPDX-License-Identifier: GPL-2.0-only
fd384412 AZ	2	#include <linux/module.h>
	3	#include <linux/errno.h>
	4	#include <linux/socket.h>
	5	#include <linux/udp.h>
	6	#include <linux/types.h>
	7	#include <linux/kernel.h>
	8	#include <linux/in6.h>
	9	#include <net/udp.h>
	10	#include <net/udp_tunnel.h>
	11	#include <net/net_namespace.h>
	12	#include <net/netns/generic.h>
	13	#include <net/ip6_tunnel.h>
	14	#include <net/ip6_checksum.h>
	15
	16	int udp_sock_create6(struct net net, struct udp_port_cfg cfg,
	17	struct socket **sockp)
	18	{
fb242745	19	struct sockaddr_in6 udp6_addr = {};
fd384412 AZ	20	int err;
	21	struct socket *sock = NULL;
	22
26abe143	23	err = sock_create_kern(net, AF_INET6, SOCK_DGRAM, 0, &sock);
fd384412 AZ	24	if (err < 0)
	25	goto error;
	26
a43a9ef6 JB	27	if (cfg->ipv6_v6only) {
	28	int val = 1;
	29
	30	err = kernel_setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
	31	(char *) &val, sizeof(val));
	32	if (err < 0)
	33	goto error;
	34	}
da5095d0	35	if (cfg->bind_ifindex) {
49b4994c DR	36	err = kernel_setsockopt(sock, SOL_SOCKET, SO_BINDTOIFINDEX,
	37	(void *)&cfg->bind_ifindex,
	38	sizeof(cfg->bind_ifindex));
da5095d0 AB	39	if (err < 0)
	40	goto error;
	41	}
a43a9ef6	42
fd384412 AZ	43	udp6_addr.sin6_family = AF_INET6;
	44	memcpy(&udp6_addr.sin6_addr, &cfg->local_ip6,
	45	sizeof(udp6_addr.sin6_addr));
	46	udp6_addr.sin6_port = cfg->local_udp_port;
	47	err = kernel_bind(sock, (struct sockaddr *)&udp6_addr,
	48	sizeof(udp6_addr));
	49	if (err < 0)
	50	goto error;
	51
	52	if (cfg->peer_udp_port) {
fb242745	53	memset(&udp6_addr, 0, sizeof(udp6_addr));
fd384412 AZ	54	udp6_addr.sin6_family = AF_INET6;
	55	memcpy(&udp6_addr.sin6_addr, &cfg->peer_ip6,
	56	sizeof(udp6_addr.sin6_addr));
	57	udp6_addr.sin6_port = cfg->peer_udp_port;
	58	err = kernel_connect(sock,
	59	(struct sockaddr *)&udp6_addr,
	60	sizeof(udp6_addr), 0);
	61	}
	62	if (err < 0)
	63	goto error;
	64
	65	udp_set_no_check6_tx(sock->sk, !cfg->use_udp6_tx_checksums);
	66	udp_set_no_check6_rx(sock->sk, !cfg->use_udp6_rx_checksums);
	67
	68	*sockp = sock;
	69	return 0;
	70
	71	error:
	72	if (sock) {
	73	kernel_sock_shutdown(sock, SHUT_RDWR);
26abe143	74	sock_release(sock);
fd384412 AZ	75	}
	76	*sockp = NULL;
	77	return err;
	78	}
	79	EXPORT_SYMBOL_GPL(udp_sock_create6);
6a93cc90	80
79b16aad DM	81	int udp_tunnel6_xmit_skb(struct dst_entry dst, struct sock sk,
79b16aad DM	82	struct sk_buff *skb,
d998f8ef TH	83	struct net_device dev, struct in6_addr saddr,
d998f8ef TH	84	struct in6_addr *daddr,
13461144 DB	85	__u8 prio, __u8 ttl, __be32 label,
13461144 DB	86	__be16 src_port, __be16 dst_port, bool nocheck)
6a93cc90 AZ	87	{
	88	struct udphdr *uh;
	89	struct ipv6hdr *ip6h;
6a93cc90 AZ	90
	91	__skb_push(skb, sizeof(*uh));
	92	skb_reset_transport_header(skb);
	93	uh = udp_hdr(skb);
	94
	95	uh->dest = dst_port;
	96	uh->source = src_port;
	97
	98	uh->len = htons(skb->len);
6a93cc90	99
6a93cc90 AZ	100	skb_dst_set(skb, dst);
6a93cc90 AZ	101
d998f8ef	102	udp6_set_csum(nocheck, skb, saddr, daddr, skb->len);
6a93cc90 AZ	103
	104	__skb_push(skb, sizeof(*ip6h));
	105	skb_reset_network_header(skb);
	106	ip6h = ipv6_hdr(skb);
13461144	107	ip6_flow_hdr(ip6h, prio, label);
6a93cc90 AZ	108	ip6h->payload_len = htons(skb->len);
	109	ip6h->nexthdr = IPPROTO_UDP;
	110	ip6h->hop_limit = ttl;
	111	ip6h->daddr = *daddr;
	112	ip6h->saddr = *saddr;
	113
79b16aad	114	ip6tunnel_xmit(sk, skb, dev);
6a93cc90 AZ	115	return 0;
	116	}
	117	EXPORT_SYMBOL_GPL(udp_tunnel6_xmit_skb);
3fcb95a8 TH	118
3fcb95a8 TH	119	MODULE_LICENSE("GPL");